using WP 3.2.1 -- gregs seo was used to hack my website last month. I found a hack from genshop.org on two different WP installs where I was using gregs seo. genshop.org drops pages into Google using your site name. Then collects IP addresses, looks up email addresses attached to the IP and sends out junk medicine spam to those emails. At least that is what I believe to happen since my junk email picks up during one of these attacks.